JP2006336336A - Earthquake resistant structure of building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an earthquake resistant structure of a building capable of being compatible with a seismic response control function to a dynamic load and proof stress generation to a static load by a simple construction with few cost rise. <P>SOLUTION: A fixed area 4 connecting respectively columns 2 and 2 with each other by making use of braces 6 and 6 is formed in the lower end side in a frame surface in a framework frame 1 formed of both right and left columns 2 and 2 and up and down horizontal members 3 and 3, displacement in the longitudinal direction of the columns 2 and 2 on an upper side in the frame surface except the fixed area 4 is permitted and, at the same time, a seismic response control area 5 equipped with dampers 8 and 8 and capable of damping the vibration in the horizontal direction is formed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vibration control structure provided in a building such as a house for attenuating vibration caused by an external force such as an earthquake or wind.

  As a building vibration control structure, a structure in which a damper is incorporated as a brace in a frame frame composed of columns and horizontal members is known. As this damper, a viscoelastic damper composed of a plurality of vibration control members in which plates, cylinders, etc. are superposed in the longitudinal direction and a viscoelastic material bonded between overlapping portions of the vibration control members is often used. . Thereby, at the time of vibration, a vibration damping action can be obtained by shear deformation of the viscoelastic body accompanying the operation of the damping member in the opposite direction. In Patent Document 1, a frame-like upper and lower frames are attached to a frame frame, and the left and right sides of the upper and lower frames are connected by flexible side plates, and a pair of hydraulic dampers are placed in the space between both frames. There is described an invention in which a damping wall panel is provided and a hydraulic damper can be operated by relatively displacing the upper and lower frames by deformation of the side plate even when a small vibration is applied.

JP 2000-45563 A

  By the way, in addition to a dynamic load due to an earthquake or the like, a static load due to wind may be applied to the building. Such a static load (especially a static load for a long time) cannot generate a stress against the viscoelastic damper having a large stress relaxation, and allows an increase in displacement. This phenomenon is the same even in the damping wall panel as in Patent Document 1, and the structure depending on the damping force of the hydraulic damper does not change even if the vibration is small, so that the proof strength against a static load cannot be expected. In particular, here, since the frame-like upper and lower frames are connected by side plates, the structure is complicated and the cost is increased.

  Therefore, the present invention can generate a suitable proof force against a static load such as wind as well as a damping effect against a dynamic load caused by an earthquake or the like with a simple structure with little cost increase. The purpose is to provide a seismic control structure for buildings.

In order to achieve the above object, the invention according to claim 1 uses at least braces on at least one side of the upper and lower ends of the frame surface in the frame frame formed by the left and right columns and the upper and lower horizontal members. A fixed area that connects the two pillars to each other is formed, and in the frame surface excluding the fixed area, a horizontal damping area that allows the horizontal displacement of both pillars and that can be damped with a damper is provided. It is formed.
In addition to the object of the first aspect, the invention described in claim 2 is arranged in such a manner that the fixed region and the vibration control region can be adapted to the external force in a balanced manner. The vibration control area is formed by a pair of dampers that are laid in an X shape between the columns and extendable in the longitudinal direction.
In addition to the object of the first aspect, the invention described in claim 3 provides a fixed region and a single one that is obliquely installed between columns in order to easily form the fixed region and the vibration control region at a lower cost. The brace is formed from the end of the brace in the seismic control area side, and the middle bridge installed between the columns, and the seismic control area extends diagonally in the longitudinal direction by being laid diagonally symmetrically with the brace between the columns. It is formed with one possible damper.

According to the first aspect of the present invention, a suitable damping function can be maintained by the damping force of the damper and the bending rigidity of the column during vibration due to an earthquake, and the reliability and durability are excellent. On the other hand, with respect to a static load caused by wind or the like, it is possible to resist the static load by reliably generating a proof stress by the bending rigidity of the column.
Since these effects can be obtained only by the arrangement form of the fixed region and the vibration control region using a normal brace or damper, the structure is simple and the cost can be reduced.
According to invention of Claim 2, in addition to the effect of Claim 1, it can be set as the suitable form which can respond to a fixed area | region and a vibration control area | region with sufficient balance with respect to a dynamic load or a static load. .
According to the third aspect of the present invention, in addition to the effect of the first aspect, the fixed region and the vibration control region can be easily formed with the minimum components, and further cost reduction can be expected.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1A is a front view of a frame frame used for a wooden house. The frame frame 1 is a pair of left and right columns 2 and 2 and a pair of columns 2 and 2 that are installed between upper ends and lower ends. In the frame surface of the frame 1, the fixed region 4 and the vibration control region 5 are divided in the vertical direction. First, the fixed region 4 is a pair that is constructed in an X shape between the joint portion below the columns 2 and 2 and the horizontal member 3 and the middle portion of the columns 2 and 2 on the substantially lower half side of the frame surface. The braces 6 and 6 connect the pillars 2 and 2 to each other.

  On the other hand, the vibration control region 5 is constructed in the same X shape between the upper end portions of the braces 6 and 6 and the gusset plates 7 and 7 provided at the upper joint portion on the substantially upper half side of the frame surface. It is formed of a pair of dampers 8 and 8 whose both ends are pin-coupled, respectively, so that horizontal vibration can be damped. A known viscoelastic damper, oil damper, or the like is employed for the damper 8. As a viscoelastic damper, one plate-like damping member and the other plate-like damping member are stacked and a viscoelastic body is bonded between the overlapping parts, or one cylinder with a different diameter is used. A sleeve type in which a cylindrical damping member and the other cylindrical damping member are loosely inserted coaxially and a viscoelastic body is bonded between the overlapping portions is used. In either case, when a tensile and compressive force is applied in the longitudinal direction, the film expands and contracts in the same direction to produce a damping action.

  In the frame frame 1 configured as described above, when a horizontal external force (dynamic load) is intermittently applied along the frame surface direction during vibration due to an earthquake, braces 6 are formed in the lower fixed region 4. 6, the deformation of the columns 2 and 2 is restricted, and as shown in FIG. 5B, the upper vibration control region 5 that is allowed to move in the left-right direction is deformed in the horizontal direction. Therefore, an axial tensile force and a compressive force are alternately applied to each damper 8. Then, each damper 8 expands and contracts in the longitudinal direction to absorb energy and cause a damping action. In particular, here, since a reaction force is generated by bending deformation of the columns 2 and 2 on the seismic control region 5 side, a dynamic load can be suitably absorbed by the damping force of the damper 8 and the bending rigidity of the column 2.

  On the other hand, when a horizontal external force is applied as a static load to the frame 1 by wind or the like, the damper 8 is extended in the longitudinal direction as the static load increases, and the other is in the longitudinal direction. The amount of displacement gradually increases, but no damping action occurs. However, as shown in FIG. 5B, the reaction force is generated when the columns 2 and 2 are similarly bent and deformed in the horizontal direction on the side of the vibration control region 5, so that this bending rigidity can resist a static load and yield strength. Can be generated.

Thus, according to the frame assembly 1 of the said form, the braces 6 and 6 are used for the lower end side of the frame surface in the frame assembly 1 formed with the pillars 2 and 2 and the horizontal members 3 and 3. A fixed region 4 is formed to connect both the pillars 2 and 2 to each other. In the frame surface excluding the fixed region 4, the horizontal displacement of both the pillars 2 and 2 is allowed and the dampers 8 and 8 are provided in the horizontal direction. By forming the seismic control region 5 that can attenuate the vibration of the seismic wave, it is possible to maintain a suitable seismic control function by the damping force of the damper 8 and the bending rigidity of the column 2 when the vibration is applied due to the earthquake. Excellent. On the other hand, with respect to a static load caused by wind or the like, it is possible to resist the static load by reliably generating a proof stress by the bending rigidity of the column 2.
These effects can be obtained only by the arrangement form of the fixed region 4 and the vibration control region 5 using the normal brace 6 and the damper 8, so that the structure is simple and the cost can be reduced.

  Further, in this embodiment, the fixed region 4 is formed by a pair of braces 6 and 6 erected in an X shape between the columns 2 and 2, and the vibration control region 5 is erected in an X shape between the columns 2 and 2. By forming the pair of dampers 8 and 8 that can be expanded and contracted in the longitudinal direction, the fixed region 4 and the vibration control region 5 can be in a suitable form that can cope with dynamic loads and static loads in a well-balanced manner. it can.

Hereinafter, a modified example will be described.
In the above embodiment, the fixed region 4 is formed on the lower side of the frame surface, and the vibration control region 5 is divided on the upper side. However, as shown in the frame assembly 1a shown in FIG. A fixed region 4 composed of X-shaped braces 6 and 6 is installed on the upper side of the bracelet, and on the lower side, the X-shaped braces 6 and 6 are installed in an X-shape between the lower ends of both braces 6 and the gusset plates 9 and 9 provided at the lower joint. However, it is possible to form the vibration control areas 5 including the dampers 8 and 8 respectively. Of course, the end of the damper may be fixed by bolts, welding or the like in addition to the pin connection, and the end of the damper on the fixed region side may be fixed to the column instead of the brace. The same applies to the following modifications.

  Further, the present invention is not limited to a configuration in which a fixed region is provided on either the upper or lower side of the frame surface and a vibration control region is provided on the other side. 11 and 11 are formed, and dampers 8 and 8 that are pin-coupled between the upper and lower fixed regions 10 and 10 at the ends of the brace 11 are laid in an X shape to control the vibration. Even if 12 is formed, the same effect as in the above embodiment can be obtained. In particular, in this vibration control structure, by providing the fixed regions 10 and 10 above and below, it is possible to maintain the vibration control function while increasing the rigidity of the frame frame itself.

  Further, in the fixed region and the vibration control region, the brace and the damper are not limited to being laid in an X shape, and the fixed region 13 is arranged below the columns 2 and 2 as in the frame frame 1c shown in FIG. Formed from one brace 14 installed obliquely and an intermediate rail 15 installed from the upper end of the brace 14 to the other column side, the damping region 16 is formed above the columns 2 and 2. It is good also as a K type | mold formed with the brace 14 and the one damper 17 constructed diagonally symmetrically with the up-down axis. The intermediate rail 15 is for obtaining the rigidity of the right column 2 where the brace 14 and the damper 17 are not connected at an intermediate portion. Of course, this form may be reversed upside down or left and right.

  On the other hand, when a viscoelastic damper is used as the damper in the vibration control region, in addition to the brace type as in the above-described embodiment, a base is provided in the upper vibration control region 18 as in the frame assembly 1d shown in FIG. The shaped tower frames 19, 19 are arranged in parallel with the frame surface so as to be symmetrical with respect to the vertical axis, and the short side portions 20, 20 overlap each other at the center of the vibration control region 18. It is also possible to adopt a structure in which a sheet-like viscoelastic body 21 is adhered between the overlapping portions. Also in this case, it is possible to obtain a damping action by shearing and deforming the viscoelastic body 21 by the relative movement of the tower frames 19 and 19 accompanying the deformation of the vibration control region 18. Of course, this configuration can also be turned upside down with respect to the lower fixing region 22. If it does in this way, the fixed area | region 22 and the damping area | region 18 can be easily formed with the minimum structure part, and cost reduction can be anticipated compared with the previous form.

The ratio between the fixed region and the vibration control region in the frame plane is not set to approximately half as in the above embodiment, but is determined in consideration of the assumed interlayer displacement and column rigidity. It ’s fine.
In addition, the present invention is not limited to a wooden structure, and can be applied to other structures such as a lightweight steel structure as long as the building uses a frame.

(A) is a front view of a frame frame, (B) is explanatory drawing which shows the behavior at the time of a horizontal load effect | action. It is a front view which shows the example of a change of a shaft frame. It is a front view which shows the example of a change of a shaft frame. It is a front view which shows the example of a change of a shaft frame. It is a front view which shows the example of a change of a shaft frame.

Explanation of symbols

1, 1a to 1d ··· Frame frame, 2 ·· Pillar, 3 ·· Horizontal member, 4, 10, 12, 13, 22 ·· Fixed region, 5, 16, 18 ·· Damping region, 6, 11, 14, ... braces, 8, 17, ... dampers, 15 ... middle piers.

Claims (3)

  A fixed region for connecting the two columns to each other using at least braces is formed on at least one side of the upper and lower ends of the frame surface of the frame assembly formed by the left and right columns and the upper and lower horizontal members, and the fixed region A vibration control structure for a building, characterized in that a vibration control region is provided in the frame surface excluding the right and left to allow horizontal displacement of both pillars and a damper to attenuate horizontal vibration.   The fixed region is formed by a pair of braces erected in an X shape between columns, and the vibration control region is formed by a pair of dampers that are erected in an X shape between the columns and extendable in the longitudinal direction. Seismic control structure of building described in 2. The fixed region is formed by one brace that is installed diagonally between the columns and an intermediate beam that is installed between the columns from the end of the brace on the side of the controlled region. The building vibration control structure according to claim 1, wherein the structure is formed of a single damper that is obliquely laid with respect to the brace in a vertical axis and is extendable in the longitudinal direction.

Images